A terrorist in a rental truck sped for nearly a mile down a popular, bike-only path in lower Manhattan on Tuesday — killing eight people in the shadow of the World Trade Center and then shouting: “Allahu Akbar.”

“This was an act of terror,” Mayor de Blasio declared at an evening press conference.

“A particularly cowardly act of terror aimed at innocent civilians, aimed at innocent people going about their lives.”

Sayfullo Saipov, a 29-year-old immigrant from Uzbekistan, was shot by a cop after getting out of his car at Chambers and West streets with two realistic-looking guns while screaming “Allahu Akbar” — Arabic for God is good, police sources said.